diff --git a/requirements.txt b/requirements.txt
index 9d6d45f..2f0033f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ jupyter-core==4.6.1
 jupyterlab==1.2.4
 jupyterlab-server==1.0.6
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.0.2
 nbconvert==5.6.1
 nbformat==4.4.0